Datasheet

LTM4628
9
4628fe
For more information www.linear.com/LTM4628
SIMPLIFIED BLOCK DIAGRAM
4628 BD
TEMP
CLKOUT
RUN1
MODE_PLLIN
PHASEMD
TRACK1
4.7µF
SS CAP
1µF
C
IN1
10µF
35V
V
IN
V
IN
C
IN2
10µF
35V
R
FB2
60.4k
MTOP1
MBOT1
POWER
CONTROL
2.2µF
0.68µH
60.4k
C
OUT1
R
FB1
40.2k
+
1.5V/8A
1.2V/8A
V
FB1
GND
GND
GND
GND
SW2
SW1
PGOOD2
PGOOD1
INTERNAL
COMP
INTERNAL
COMP
INTERNAL
FILTER
1µF
C
IN3
10µF
35V
MTOP2
MBOT2
C
IN4
10µF
35V
2.2µF
0.68µH
C
OUT2
+
+
–
60.4k
XI
V
OUT1
V
OUT2
V
FB2
V
OUTS2
V
OUTS1
R
fSET
V
IN
R
T
SS CAP
DIFFOUT
DIFFN
DIFFP
COMP1
SGND
TRACK2
INTV
CC
EXTV
CC
RUN2
COMP2
f
SET
SGND
V
IN
R
T
100µA =
DECOUPLING REQUIREMENTS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
C
IN1
, C
IN3
C
IN2
, C
IN4
External Input Capacitor Requirement
(V
IN1
= 4.5V to 26.5V, V
OUT1
= 1.5V)
(V
IN2
= 4.5V to 26.5V, V
OUT2
= 1.5V)
I
OUT1
= 8A
I
OUT2
= 8A
22
22
µF
µF
C
OUT1
C
OUT2
External Output Capacitor Requirement
(V
IN1
= 4.5V to 26.5V, V
OUT1
= 1.5V)
(V
IN2
= 4.5V to 26.5V, V
OUT2
= 1.5V)
I
OUT1
= 8A
I
OUT2
= 8A
300
300
µF
µF
T
A
= 25°C. Use Figure 1 configuration.
Figure 1. Simplified LTM4628 Block Diagram